## Q&A - PSLE Math

### Re: Q&A - PSLE Math

vvv

Q: 1695506

Subject: {Math}

Level: {P6}

Tags: {Ratio}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Nanyang Primary School}

^^^

After S paid,

S:M:R -> 3:8:9

After R paid,

S:M:R -> 5:4:1 or 10:8:2

After M paid,

S:M:R -> 10:1:9

S -> 10u

M -> 8u

R -> 9u

Meal -> 10u - 3u = 7u

S had $40 more than M,

10u - 8u = 40

2u = 40

1u = 20

Cost of meal -> 7u = $140

Q: 1695506

Subject: {Math}

Level: {P6}

Tags: {Ratio}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Nanyang Primary School}

^^^

After S paid,

S:M:R -> 3:8:9

After R paid,

S:M:R -> 5:4:1 or 10:8:2

After M paid,

S:M:R -> 10:1:9

S -> 10u

M -> 8u

R -> 9u

Meal -> 10u - 3u = 7u

S had $40 more than M,

10u - 8u = 40

2u = 40

1u = 20

Cost of meal -> 7u = $140

### Re: Q&A - PSLE Math

vvv

Q:

Subject: {Math}

Level: {P6}

Tags: {Fractions}

Source: {methodist , SA1, 2014}

^^^

Mrs Tan baked 185 more chocolate cupcakes than lemon cupcakes. After selling 3/5 of the chocolate cupcakes and 1/2 of the lemon cupcakes, she had 146 cupcakes. How many cupcakes did she sell ?

Can someone help up this question ? showing the working ? Thank you very much

Q:

Subject: {Math}

Level: {P6}

Tags: {Fractions}

Source: {methodist , SA1, 2014}

^^^

Mrs Tan baked 185 more chocolate cupcakes than lemon cupcakes. After selling 3/5 of the chocolate cupcakes and 1/2 of the lemon cupcakes, she had 146 cupcakes. How many cupcakes did she sell ?

Can someone help up this question ? showing the working ? Thank you very much

### Re: Q&A - PSLE Math

vvv

A: 1695569

Subject: {Math}

Level: {P6}

Tags: {Fractions}

Source: {methodist , SA1, 2014}

^^^

Lemon cupcakes = 10u

Choc cupcakes = 10u + 185

Why select 10u? Coz 10 is LCM of 2 and 5, i.e. can be divive by 2 and 5 (1/2 or 1/5).

After sales,

Lemon = 5u , {1/2 of 10u}

Choc = 4u + 74 , {2/5 of (10u + 185)

5u + 4u + 74 = 146

9u + 74 = 146

9u = 72

u = 8

At first total cupcakes = 10u + 10u + 185 = 20u + 185 = 345

Number of cupcakes sold = 345 - 146 = 199

A: 1695569

Subject: {Math}

Level: {P6}

Tags: {Fractions}

Source: {methodist , SA1, 2014}

^^^

Lemon cupcakes = 10u

Choc cupcakes = 10u + 185

Why select 10u? Coz 10 is LCM of 2 and 5, i.e. can be divive by 2 and 5 (1/2 or 1/5).

After sales,

Lemon = 5u , {1/2 of 10u}

Choc = 4u + 74 , {2/5 of (10u + 185)

5u + 4u + 74 = 146

9u + 74 = 146

9u = 72

u = 8

At first total cupcakes = 10u + 10u + 185 = 20u + 185 = 345

Number of cupcakes sold = 345 - 146 = 199

### Re: Q&A - PSLE Math

Subject: {Math}

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Please help me solve this problem.

The number of children in a town decreased to 8827, while the number of adults increased by 42% to 15194. The total number of people decreased by 259.

Q1. What is the increase in number of adults?

Q2. What is the percentage decrease in the total number of children?

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Please help me solve this problem.

The number of children in a town decreased to 8827, while the number of adults increased by 42% to 15194. The total number of people decreased by 259.

Q1. What is the increase in number of adults?

Q2. What is the percentage decrease in the total number of children?

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- KiasuGrandMaster
**Posts:**1199**Joined:**Sun Sep 12,**Total Likes:**5

### Re: Q&A - PSLE Math

Subject: {Math}RJ_164 wrote:Subject: {Math}

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Please help me solve this problem.

The number of children in a town decreased to 8827, while the number of adults increased by 42% to 15194. The total number of people decreased by 259.

Q1. What is the increase in number of adults?

Q2. What is the percentage decrease in the total number of children?

Level: {P6}

Tags: {percentage}

Source: {P6 Maths 2015 Preliminary Examination 2015 - Singapore Chinese Girl's School}

Q1.

100 + 42 = 142

142% ------- 15194

1% ------- 15194/142 = 107

100% ------- 107 x 100 =10700

15194 - 10700 = 4494

Q2.

4494 + 259 = 4753 (decrease in the number of children)

4753 + 8827 = 13580 (total number of children at first)

(4755/13580) x 100% = 35%

Ans : Q1. 4494; Q2. 35%.

### Re: Q&A - PSLE Math

Level : {p6}

Tag :{Volume}

Source : {2014 prelims Nanyang q14}

Hi all,

Pls help on the below !

Tag :{Volume}

Source : {2014 prelims Nanyang q14}

Hi all,

Pls help on the below !